Dry-method pre-film-forming device and dry-method pre-film-forming system

Abstract

The invention relates to the technical field of lithium battery dry-method membrane preparation, in particular to a dry-method membrane pre-forming device and a dry-method membrane pre-forming system. The invention provides a dry-method film pre-forming device. The dry-method film pre-forming device comprises a rack, a discharging assembly and a dry-method film stripping assembly. The discharging assembly and the dry-method membrane stripping assembly are both arranged on the rack, the discharging assembly is provided with a material cavity and a membrane forming cavity which communicate with each other, the material cavity is used for containing powder and conveying the powder into the membrane forming cavity, and the membrane forming cavity is used for extruding the powder into membranes; the dry-method membrane stripping assembly is located on the downstream of the membrane forming cavity and used for stripping the membrane from the discharging assembly. The dry-method membrane stripping assembly is arranged on the downstream of the membrane forming cavity in the direction from the material cavity to the membrane forming cavity, so that the movement direction of the membrane between the membrane forming cavity and the dry-method membrane stripping assembly is the same as the movement direction of the membrane in the membrane forming cavity, and the membrane can be effectively prevented from being torn during stripping.

Description

Technical Field

[0001] The present invention relates to the technical field of lithium battery dry film forming, and in particular to a dry pre-film forming device and a dry pre-film forming system. Background Art

[0002] At present, the manufacturing process of lithium battery pole pieces is mainly based on wet slurry coating technology. Since the dry pole piece manufacturing process has very obvious advantages in terms of non-toxicity, energy saving and emission reduction, and saving factory space, more and more companies are investing in the research and development of dry pole piece manufacturing.

[0003] At present, the dry process film forming method generally adopts a process of continuous calendering of the film forming structure and step-by-step thinning, and a peeling roller is arranged downstream of the film forming structure. The film is peeled off from the film forming structure by the peeling roller. However, in the prior art, the peeling roller will change the movement direction of the film from the film forming direction, causing the film to be easily torn during peeling. Summary of the invention

[0004] The object of the present invention is to provide a dry pre-filming device and a dry pre-filming system to solve the technical problem in the prior art that the peeling roller changes the movement direction of the film from the film forming direction, causing the film to be easily torn during peeling.

[0005] In a first aspect, the present invention provides a dry pre-filming device, comprising: a frame, a material unloading assembly and a dry film stripping assembly;

[0006] The material discharge assembly and the dry film stripping assembly are both arranged on the frame, the material discharge assembly has a material cavity and a film forming cavity which are interconnected, the material cavity is used to contain powder material and convey the powder material to the film forming cavity, and the film forming cavity is used to extrude the powder material into a film;

[0007] The dry film stripping assembly is located downstream of the film forming chamber, and the dry film stripping assembly is used to strip the film from the blanking assembly.

[0008] In an optional embodiment, the frame includes a pair of side plates, and the unloading assembly includes a pair of steel belt conveying mechanisms;

[0009] A pair of the steel belt conveying mechanisms are arranged opposite to and at intervals between the pair of the side plates, and the pair of the steel belt conveying mechanisms and the pair of the side plates sequentially enclose the material cavity and the film-forming cavity, and the steel belt conveying mechanisms are used to convey the powder in the material cavity to the film-forming cavity, and extrude the powder in the film-forming cavity into a film sheet;

[0010] The dry film stripping assembly is arranged between a pair of the side plates.

[0011] In an optional embodiment, the steel belt conveying mechanism includes an endless steel belt, a steel belt driving roller, a steel belt passing roller and a steel belt supporting plate;

[0012] The annular steel belt is sleeved on the steel belt driving roller and the steel belt passing roller, and the annular steel belt and the pair of side plates enclose the material cavity and the film forming cavity in sequence;

[0013] The steel belt support plate is provided on the inner side of the annular steel belt at least corresponding to the film forming cavity, and an air blowing port is provided on the steel belt support plate at least corresponding to the film forming cavity, and the air blowing port is used to blow air into the annular steel belt to form an air lubrication layer between the annular steel belt and the steel belt support plate.

[0014] In an optional embodiment, the steel belt conveying mechanism further includes a heating tube, which is disposed in the steel belt support plate and is used to heat the steel belt support plate.

[0015] In an optional embodiment, the dry film stripping assembly includes a driving motor, a driving roller, a driven roller, a first magnetic wheel and a second magnetic wheel;

[0016] The driving motor, the active roller, and the driven roller are all arranged on the frame;

[0017] The first magnetic wheel is connected to the output end of the driving motor, and the second magnetic wheel is connected to the driving roller;

[0018] The first magnetic wheel is connected to the second magnetic wheel by magnetic transmission.

[0019] In an optional embodiment, the dry film stripping assembly further includes a first translation drive mechanism, and the first translation drive mechanism is disposed on the frame;

[0020] The first translation driving mechanism is connected to the driven roller and is used to drive the driven roller to move toward the active roller or away from the active roller.

[0021] In an optional embodiment, at least one powder leveling component is further included;

[0022] The powder flattening assembly is arranged on the frame and located at the material cavity, and the powder flattening assembly is used for flattening the powder in the material cavity.

[0023] In an optional embodiment, the powder flattening assembly includes a second translation drive mechanism and a flattening rod;

[0024] The second translation driving mechanism is arranged on the frame and is located at one end of the material chamber away from the film forming chamber. One end of the flattening rod is connected to the second translation driving mechanism, and the other end is located in the material chamber.

[0025] The second translation driving mechanism is used to drive the flattening rod to perform reciprocating translational motion in the material cavity.

[0026] In an optional embodiment, the powder leveling assembly further includes a distance measuring sensor;

[0027] The distance measuring sensor is arranged on the second translation driving mechanism, and the second translation driving mechanism is used to drive the flattening rod and the distance measuring sensor to move synchronously;

[0028] The distance measuring sensor is used to detect the height of the powder at the leveling rod.

[0029] In a second aspect, the present invention provides a dry pre-filming system, comprising a feeding device and the dry pre-filming device described in any one of the aforementioned embodiments, wherein the feeding device is used to supply powder into the material chamber.

[0030] Compared with the prior art, the dry pre-filming device and dry pre-filming system provided by the present invention have the following technical advantages:

[0031] The dry pre-filming device provided by the present invention comprises: a frame, a material unloading assembly and a dry film stripping assembly; the material unloading assembly and the dry film stripping assembly are both arranged on the frame, the material unloading assembly has a material chamber and a film forming chamber that are interconnected, the material chamber is used to hold powder and convey the powder to the film forming chamber, and the film forming chamber is used to extrude the powder into a film; the dry film stripping assembly is located downstream of the film forming chamber, and the dry film stripping assembly is used to strip the film from the material unloading assembly.

[0032] The material chamber can not only hold powder but also transport the powder to the film forming chamber to realize automatic feeding of the film forming chamber. The film forming chamber can extrude the powder transported by the material chamber into a film to realize automatic film forming. Since a dry film stripping component is arranged downstream of the film forming chamber, the movement direction of the film between the film forming chamber and the dry film stripping component is the same as the movement direction of the film in the film forming chamber, which can effectively prevent the film from being torn during stripping.

[0033] The dry pre-filming system provided by the present invention includes the above-mentioned dry pre-filming device. Therefore, the technical advantages and effects achieved by it include the technical advantages and effects achieved by the above-mentioned dry pre-filming device, which will not be elaborated in detail here.

[0034] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A schematic structural diagram of a dry pre-filming device provided in an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of the structure and installation of a dry pre-filming device provided in an embodiment of the present invention;

[0038] Figure 3 A schematic diagram of the structure of a dry pre-film forming system provided in an embodiment of the present invention;

[0039] Figure 4 A schematic diagram of the structure of the lower steel belt support plate provided in an embodiment of the present invention;

[0040] Figure 5 A schematic diagram of the structure of a dry film stripping assembly provided in an embodiment of the present invention;

[0041] Figure 6 A schematic diagram of the structure of a motor base provided in an embodiment of the present invention;

[0042] Figure 7 A top view of a dry pre-film forming device provided in an embodiment of the present invention.

[0043] Icons: 1-dry film stripping assembly; 2-frame; 3-drive motor; 4-active roller; 5-driven roller; 6-first magnetic wheel; 7-second magnetic wheel; 8-slide cylinder; 9-bearing seat; 10-driven roller bearing; 11-motor seat; 12-waist-shaped hole; 13-active roller bearing; 14-rubber coating; 15-side plate; 16-powder flattening assembly; 17-material chamber; 18-film forming chamber; 19-flattening rod; 20-sliding block; 21-flattening Sliding table; 22-sliding table motor; 23-distance measuring sensor; 24-drag chain; 25-steel belt conveying mechanism; 26-annular steel belt; 27-steel belt active roller; 28-first steel belt roller; 29-second steel belt roller; 30-third steel belt roller; 31-fourth steel belt roller; 32-steel belt tensioning roller; 33-lower steel belt support plate; 34-upper steel belt support plate; 35-blowing port; 36-air inlet; 37-heating pipe; 38-feeding device. DETAILED DESCRIPTION

[0044] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0046] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the fact that ordinary technicians in the field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0048] The present invention is further described in detail below through specific implementation examples in conjunction with the accompanying drawings.

[0049] Specific structure such as Figures 1 to 7 shown.

[0050] The present embodiment provides a dry pre-filming device, comprising: a frame 2, a feeding assembly and a dry film stripping assembly 1; the feeding assembly and the dry film stripping assembly 1 are both arranged on the frame 2, the feeding assembly has a material chamber 17 and a film forming chamber 18 which are interconnected, the material chamber 17 is used to hold powder and convey the powder to the film forming chamber 18, and the film forming chamber 18 is used to extrude the powder into a film; the dry film stripping assembly 1 is located downstream of the film forming chamber 18, and the dry film stripping assembly 1 is used to strip the film from the feeding assembly.

[0051] In the present embodiment, the material chamber 17 can not only hold the powder but also transport the powder to the film forming chamber 18, thereby realizing automatic feeding of the film forming chamber 18. The film forming chamber 18 can extrude the powder transported by the material chamber 17 into a film to realize automatic film forming. Since the dry film stripping component 1 is arranged downstream of the film forming chamber 18, the movement direction of the film between the film forming chamber 18 and the dry film stripping component 1 is the same as the movement direction of the film in the film forming chamber 18, which can effectively prevent the film from being torn during stripping.

[0052] In this embodiment, the material chamber 17 is preferably located above the film forming chamber 18, and the dry film stripping assembly 1 is located below the film forming chamber 18, that is, the material chamber 17, the film forming chamber 18 and the dry film stripping assembly 1 are arranged vertically to form a vertical dry pre-filming device. However, it is not limited to this, the material chamber 17, the film forming chamber 18 and the dry film stripping assembly 1 can also be arranged horizontally to form a horizontal dry pre-filming device.

[0053] In the optional technical solution of this embodiment, the frame 2 includes a pair of side plates 15, and the unloading assembly includes a pair of steel belt conveying mechanisms 25; the pair of steel belt conveying mechanisms 25 are arranged oppositely and at intervals between the pair of side plates 15, and the pair of steel belt conveying mechanisms 25 and the pair of side plates 15 respectively form a material chamber 17 and a film forming chamber 18, and the steel belt conveying mechanism 25 is used to convey the powder in the material chamber 17 to the film forming chamber 18, and to extrude the powder in the film forming chamber 18 into a film; the dry film stripping assembly 1 is arranged between the pair of side plates 15.

[0054] In this embodiment, the upper part of the pair of steel belt conveying mechanisms 25 and the pair of side plates 15 enclose a material chamber 17, and the lower part and the pair of side plates 15 enclose a film-forming chamber 18. The pair of steel belt conveying mechanisms 25 convey powder downward together, and the feeding effect of the powder from the material chamber 17 into the film-forming chamber 18 is stable, and the film-forming effect of the film-forming chamber 18 is stable. At the same time, the overall structure is simple, and during the conveying process of the powder, the pair of side plates 15 can prevent the powder from leaking out.

[0055] In an optional technical solution of this embodiment, in the material chamber 17, there is a first interval between a pair of steel belt conveying mechanisms 25, and in the film forming chamber 18, there is a second interval between a pair of steel belt conveying mechanisms 25; the first interval is larger than the second interval.

[0056] In this embodiment, the first interval is larger than the second interval, so that when the pair of steel belt conveying mechanisms 25 convey powder, more powder enters the film-forming chamber 18 from the material chamber 17, thereby ensuring the stability of the powder supply. At the same time, the powder in the film-forming chamber 18 is more compact after film formation, thereby improving the compaction density. However, this embodiment is not limited to this, and a part of the first interval may be larger than the second interval, and another part may be equal to the first interval, or other settings that meet the needs may be used.

[0057] In the optional technical solution of this embodiment, the first interval gradually decreases from one end of the material chamber 17 away from the film-forming chamber 18 to the end facing the film-forming chamber 18. That is, in the material chamber 17, a first angle is formed between the pair of steel belt conveying mechanisms 25 to facilitate the conveying of powder. However, this embodiment is not limited to this, and the size of the first interval may also remain unchanged from one end of the material chamber 17 away from the film-forming chamber 18 to the end facing the film-forming chamber 18.

[0058] In the optional technical solution of this embodiment, the second interval gradually decreases from one end of the film-forming chamber 18 toward the material chamber 17 to the end away from the material chamber 17. That is, in the film-forming chamber 18, there is a second angle between the pair of steel belt conveying mechanisms 25, so that the powder is gradually compressed as the pair of steel belt conveying mechanisms 25 convey, and the film-forming effect is good. However, this embodiment is not limited to this, and the size of the second interval may also remain unchanged from one end of the film-forming chamber 18 toward the material chamber 17 to the end away from the material chamber 17.

[0059] Preferably, in the material chamber 17, a pair of steel belt conveying mechanisms 25 have a first angle therebetween, and in the film forming chamber 18, a pair of steel belt conveying mechanisms 25 have a second angle therebetween, and the first angle is greater than the second angle.

[0060] In this embodiment, the material discharge assembly may also include a hopper and pressure rollers arranged below the hopper. The hopper forms a material cavity 17, and a film-forming cavity 18 is formed between the pressure rollers. The hopper can transport powder to between the pressure rollers by gravity, or by vibration.

[0061] In the optional technical solution of the present embodiment, the steel belt conveying mechanism 25 includes an annular steel belt 26, a steel belt active roller 27, a steel belt passing roller and a steel belt support plate; the annular steel belt 26 is sleeved on the steel belt active roller 27 and the steel belt passing roller, and together with a pair of side plates 15, a material cavity 17 and a film forming cavity 18 are enclosed in sequence; a steel belt support plate is provided on the inner side of the annular steel belt 26 at least corresponding to the film forming cavity 18, and an air port 35 is provided on the steel belt support plate at least corresponding to the film forming cavity 18, and the air port 35 is used to blow air to the annular steel belt 26 to form an air lubrication layer between the annular steel belt 26 and the steel belt support plate.

[0062] In this embodiment, four steel belt rollers can be provided, namely the first steel belt roller 28, the second steel belt roller 29, the third steel belt roller 30 and the fourth steel belt roller 31, wherein the first steel belt roller 28 is located at the upper end of the material chamber 17, the second steel belt roller 29 is located between the material chamber 17 and the film forming chamber 18, the third steel belt roller 30 is located at the lower end plate of the film forming chamber 18, and the fourth steel belt roller 31 is located between the steel belt active roller 27 and the first steel belt roller 28 for transition, and the annular steel belt 26 rotates smoothly as a whole. Furthermore, the steel belt conveying mechanism 25 can also include a steel belt tensioning roller 32, which is located between the steel belt active roller 27 and the third steel belt passing roller 30 and is used to adjust the tension of the annular steel belt 26. The steel belt tensioning roller 32 can be adjusted up and down to adjust the tension of the annular steel belt 26. After the annular steel belt 26 is tensioned, the annular steel belt 26 will be tightly attached to the steel belt active roller 27, thereby providing the friction required for transmission. When the steel belt active roller 27 rotates, it will drive the annular steel belt 26 to rotate.

[0063] It should be noted that the number of steel belt rollers is not limited to four, and any number can be set according to needs as long as the needs are met.

[0064] In this embodiment, one steel belt support plate can be provided, and in this case, the steel belt support plate is a lower steel belt support plate 33, and is provided between the second steel belt roller 29 and the third steel belt roller 30 and corresponds to the film forming chamber 18. Since the powder in the film forming chamber 18 will generate a very large rebound force when compressing the film, a very large friction force will be generated between the lower part of the annular steel belt 26 and the lower steel belt support plate 33. Therefore, a blowing port 35 is provided on the lower steel belt support plate 33, and the blowing port 35 is connected to the air inlet 36 through a channel provided inside the lower steel belt support plate 33. High-pressure gas is introduced into the air inlet 36, and the high-pressure gas will be ejected from the blowing port 35, thereby forming a layer of air cushion, i.e., an air lubrication layer, between the lower steel belt support plate 33 and the lower part of the annular steel belt 26, which plays a role of air lubrication, thereby greatly reducing the friction force between the annular steel belt 26 and the lower steel belt support plate 33.

[0065] Specifically, multiple blowing ports 35 can be provided, that is, multiple rows of fine holes are processed on the side of the lower steel belt support plate 33 facing the film forming cavity 18, and the fine holes are the blowing ports 35. Each row of fine holes is connected to the corresponding air inlet 36 through an internal channel. The structure is simple and the air lubrication effect is improved.

[0066] However, the present embodiment is not limited thereto, and two steel belt support plates may be provided, one of which is the lower steel belt support plate 33 and the other is the upper steel belt support plate 34. The upper steel belt support plate 34 is provided between the first steel belt roller 28 and the second steel belt roller 29 and corresponds to the material chamber 17. Since the material chamber 17 exerts a relatively small extrusion force on the powder when feeding the film-forming chamber 18, the rebound force generated by the powder is relatively small, so that the friction force generated between the upper part of the annular steel belt 26 and the upper steel belt support plate 34 is also relatively small, at this time, the upper steel belt support plate 34 may not be provided with an air port 35, but the present embodiment is not limited thereto, and the upper steel belt support plate 34 may also be provided with an air port 35, and the specific setting method is the same as that of the lower steel belt support plate 33, which will not be described in detail here.

[0067] At the same time, in this embodiment, the steel belt support plates are not limited to being set at one or two, but more than two may be set. Other steel belt support plates are set at specific required positions according to needs, and whether to set the blowing port 35 also depends on needs.

[0068] In an optional technical solution of this embodiment, the steel belt conveying mechanism 25 further includes a heating tube 37, which is disposed in the steel belt supporting plate and is used to heat the steel belt supporting plate.

[0069] Specifically, a plurality of heating tubes 37 are provided in the lower steel belt support plate 33 to heat the powder. After the powder is heated, the adhesion and fluidity of the powder can be significantly improved, so that the powder can be more compact after film formation and the compaction density can be improved.

[0070] It should be noted that a plurality of heating tubes 37 may also be provided in the upper steel belt support plate 34 , depending on specific needs.

[0071] In the optional technical solution of this embodiment, the dry film stripping assembly 1 includes a driving motor 3, an active roller 4, a driven roller 5, a first magnetic wheel 6 and a second magnetic wheel 7; the driving motor 3, the active roller 4 and the driven roller 5 are all arranged on the frame 2; the first magnetic wheel 6 is connected to the output end of the driving motor 3, and the second magnetic wheel 7 is connected to the active roller 4; the first magnetic wheel 6 and the second magnetic wheel 7 are connected by magnetic transmission.

[0072] In this embodiment, the film after the powder is squeezed into a film passes between the active roller 4 and the driven roller 5, and the driving motor 3 drives the first magnetic wheel 6 to rotate. The first magnetic wheel 6 transmits the torque to the second magnetic wheel 7 through magnetic force, thereby transmitting the torque to the active roller 4. The active roller 4 and the driven roller 5 cooperate to apply tension to the film, pull the film to move and realize the peeling of the film. Since the first magnetic wheel 6 and the second magnetic wheel 7 are connected by magnetic transmission, the torque is transmitted by magnetic force, and there is no rigid connection. Therefore, there is no rigid impact when the driving motor 3 is started, which effectively avoids the tearing of the film. When the powder pressing and film forming is stopped, the film is stopped from being transported between the active roller 4 and the driven roller 5. At this time, the friction between the film between the active roller 4 and the driven roller 5 and the active roller 4 and the driven roller 5 becomes larger, resulting in the first magnetic wheel 6 being unable to continue to drive the second magnetic wheel 7 to rotate, so that the active roller 4 and the driven roller 5 stop rotating, but the driving motor 3 can still rotate freely, avoiding the motor from being blocked and preventing the motor from being damaged.

[0073] In the optional technical solution of this embodiment, the axis of the first magnetic wheel 6 is parallel to the axis of the second magnetic wheel 7. The first magnetic wheel 6 and the second magnetic wheel 7 are non-contactly matched and transmitted, which can conveniently adjust the magnitude of the torque transmitted between the first magnetic wheel 6 and the second magnetic wheel 7, and further avoid the tearing of the diaphragm.

[0074] The present embodiment is not limited thereto, the axes of the first magnetic wheel 6 and the second magnetic wheel 7 may also be perpendicular to each other, and the axes of the two may not be in the same plane. This arrangement can also prevent the diaphragm from tearing.

[0075] In the optional technical solution of this embodiment, the dry film stripping assembly 1 also includes a first translation drive mechanism, which is arranged on the frame 2; the first translation drive mechanism is connected to the driven roller 5 and is used to drive the driven roller 5 to move toward the active roller 4 or away from the active roller 4.

[0076] In this embodiment, the driven roller 5 is driven to move by the first translation drive mechanism, so that the interval between the active roller 4 and the driven roller 5 can be adjusted, which not only facilitates the initial insertion of the diaphragm between the active roller 4 and the driven roller 5, but also facilitates the adjustment of the compression degree of the diaphragm to achieve the adjustment of the tension applied to the diaphragm, thereby further avoiding diaphragm tearing.

[0077] In an optional technical solution of this embodiment, the first translation driving mechanism includes a pair of slide cylinders 8 ; the output ends of the pair of slide cylinders 8 are respectively connected to the two ends of the driven roller 5 .

[0078] Specifically, the active roller 4 and the driven roller 5 are both arranged between a pair of side plates 15, a pair of slide cylinders 8 are respectively connected to the pair of side plates 15, and the output ends of the pair of slide cylinders 8 are respectively connected to the two ends of the driven roller 5. The overall structure is simple, the drive is stable and the cost is low.

[0079] In the optional technical solution of this embodiment, the dry film stripping assembly 1 also includes a bearing seat 9; the driven roller 5 is connected to the bearing seat 9 through a driven roller bearing 10; the first translation drive mechanism is connected to the bearing seat 9, and the first translation drive mechanism drives the driven roller 5 to approach or move away from the active roller 4 through the bearing seat 9.

[0080] In this embodiment, a pair of bearing seats 9 are provided, and the two ends of the driven roller 5 are respectively connected to the pair of bearing seats 9 through driven roller bearings 10. The output end of the slide cylinder 8 is connected to the bearing seat 9. The slide cylinder 8 drives the driven roller 5 to move by driving the bearing seat 9 to ensure stability.

[0081] The present embodiment is not limited thereto, and the first translation driving mechanism may also be an electric slide or a telescopic motor, and its configuration is the same as that of the slide cylinder 8, which will not be described in detail here.

[0082] In an optional technical solution of this embodiment, the dry film stripping assembly 1 further includes a motor base 11 ; the motor base 11 is connected to the frame 2 , and the driving motor 3 is connected to the motor base 11 .

[0083] In this embodiment, the driving motor 3 is connected to the side plate 15 via the motor seat 11, which is convenient for installation and has a stable connection.

[0084] In an optional technical solution of the present embodiment, a waist-shaped hole 12 is provided on the motor base 11 , and the motor base 11 is connected to the frame 2 via a connecting piece and the waist-shaped hole 12 .

[0085] In this embodiment, the connecting piece connects the motor base 11 to the side plate 15 through the waist-shaped hole 12. The installation position of the motor base 11 can be adjusted through the waist-shaped hole 12, thereby adjusting the distance between the first magnetic wheel 6 and the second magnetic wheel 7, and then adjusting the size of the torque transmitted between the first magnetic wheel 6 and the second magnetic wheel 7, thereby improving applicability.

[0086] In an optional technical solution of this embodiment, the dry film stripping assembly 1 further includes an active roller bearing 13 ; both ends of the active roller 4 are connected to the frame 2 through the active roller bearing 13 .

[0087] In this embodiment, active roller bearings 13 are provided at both ends of the active roller 4, and the active roller 4 is connected to the side plate 15 through the active roller bearings 13, and the end of the active roller 4 passes through the side plate 15 and is connected to the second magnetic wheel 7, that is, the first magnetic wheel 6 and the second magnetic wheel 7 cooperate on the outside of the side plate 15 to avoid interfering with the work of the active roller 4.

[0088] In an optional technical solution of this embodiment, a rubber coating layer 14 is provided on the active roller 4 ; and / or a rubber coating layer 14 is provided on the driven roller 5 .

[0089] Preferably, in this embodiment, both the active roller 4 and the driven roller 5 are provided with a rubber coating layer 14 , which is in contact with the diaphragm through the rubber coating layer 14 to ensure the effect of the diaphragm and avoid damage to the diaphragm.

[0090] The working process of this embodiment is:

[0091] The extruded diaphragm passes through the rubber coating 14 of the active roller 4 and the driven roller 5, and then a pair of slide cylinders 8 extend to make the driven roller 5 press the diaphragm between the rubber coating 14 of the active roller 4 and the driven roller 5. The driving motor 3 drives the first magnetic wheel 6 to rotate, and transmits the torque to the second magnetic wheel 7 through magnetic force, thereby transmitting the torque to the active roller 4, so that the diaphragm always maintains a certain tension, and this tension can pull the diaphragm to move to achieve the peeling of the diaphragm.

[0092] The optional technical solution of this embodiment further includes at least one powder flattening component 16 ; the powder flattening component 16 is arranged on the frame 2 and located at the material cavity 17 , and the powder flattening component 16 is used to flatten the powder in the material cavity 17 .

[0093] In the present embodiment, since a powder flattening assembly 16 is provided on the frame 2, the powder in the material chamber 17 is flattened by the powder flattening assembly 16, thereby ensuring the uniformity of powder conveying from the material chamber 17 to the film forming chamber 18 and the continuity of conveying and feeding, thereby avoiding the low compaction density of the film after the film forming chamber 18 squeezes the powder into a film and avoiding the phenomenon that the film is prone to defects, holes and cracks.

[0094] In the optional technical solution of this embodiment, the powder flattening assembly 16 includes a second translational drive mechanism and a flattening rod 19; the second translational drive mechanism is arranged on the frame 2, and is located at one end of the material chamber 17 away from the film forming chamber 18, one end of the flattening rod 19 is connected to the second translational drive mechanism, and the other end is located in the material chamber 17; the second translational drive mechanism is used to drive the flattening rod 19 to reciprocate in the material chamber 17.

[0095] In this embodiment, the second translation drive mechanism is arranged on the side plate 15 and is located above the material chamber 17. One end of the flattening rod 19 is connected to the second translation drive mechanism, and the other end extends into the material chamber 17. When the powder is placed in the material chamber 17, the flattening rod 19 is partially inserted into the powder. The second translation drive mechanism drives the flattening rod 19 to move back and forth in the powder to flatten the powder. The structure is simple and the flattening effect is stable.

[0096] The present embodiment is not limited to this, and the powder flattening assembly 16 may also include a driving mechanism and a scraper. The driving mechanism may be a second translation driving mechanism, and the scraper is connected to the second translation driving mechanism. The second translation driving mechanism drives the scraper to translate in the material chamber 17 to scrape the top of the powder in the material chamber 17 flat. The driving mechanism may be a rotary driving mechanism, and the scraper is connected to the rotary driving mechanism. The rotary driving mechanism drives the scraper to rotate in the material chamber 17 to scrape the top of the powder in the material chamber 17 flat.

[0097] In the optional technical solution of this embodiment, the second translation drive mechanism includes a slider 20, a translation slide 21 and a slide motor 22; the slider 20 is arranged on the translation slide 21, and the slide motor 22 is connected to the translation slide 21; the slide motor 22 is used to drive the translation slide 21 to drive the slider 20 to move back and forth on the translation slide 21.

[0098] Specifically, the translation slide 21 is connected to a pair of side plates 15, that is, it spans a pair of side plates 15. The slide motor 22 drives the slider 20 to reciprocate between the pair of side plates 15 through the translation slide 21, thereby driving the flattening rod 19 to move back and forth between the pair of side plates 15 to flatten the mountain-shaped powder in the material chamber 17. The second translation drive mechanism has a simple structure and stable drive, and it is convenient to adjust the movement speed of the flattening rod 19 according to needs.

[0099] However, the present embodiment is not limited thereto, and the second translation driving mechanism may also be a pneumatic slide, a telescopic motor or a telescopic cylinder, as long as the requirements are met.

[0100] In the optional technical solution of this embodiment, the powder flattening assembly 16 also includes a distance sensor 23; the distance sensor 23 is arranged on the second translation drive mechanism, and the second translation drive mechanism is used to drive the flattening rod 19 and the distance sensor 23 to move synchronously; the distance sensor 23 is used to detect the powder height at the flattening rod 19.

[0101] In this embodiment, the distance sensor 23 is arranged on the slider 20, so that the flattening rod 19 and the distance sensor 23 can move synchronously, and the powder height is detected after the powder is flattened, so that the powder height can be judged more accurately.

[0102] Specifically, the distance sensor 23 can be set to read the measurement data every time the slider 20 moves a small distance (for example, every 3 mm). Then, the arithmetic mean of all the data read in the entire stroke can be calculated to obtain a more accurate powder height, and whether it is necessary to add material to the material chamber 17 can be determined based on the powder height, thereby achieving more accurate automatic feeding.

[0103] In an optional technical solution of this embodiment, the distance measuring sensor 23 is an ultrasonic sensor, a laser sensor, an infrared sensor or a millimeter wave radar sensor.

[0104] In an optional technical solution of this embodiment, the powder flattening assembly 16 further includes a drag chain 24; the drag chain 24 is arranged on one side of the second translation drive mechanism, and the circuit of the distance sensor 23 is arranged in the drag chain 24. The arrangement of the drag chain 24 can prevent the circuit of the distance sensor 23 from being damaged during movement.

[0105] In this embodiment, the rack 2 is not limited to the above structure. The rack 2 may also include two pairs of side panels 15, and the two pairs of side panels 15 form a frame. The rack 2 may also be other forms of structures as long as the requirements are met.

[0106] The present embodiment provides a dry pre-filming system, comprising a feeding device 38 and the above-mentioned dry pre-filming device. Therefore, the technical advantages and effects achieved by the dry pre-filming system include the technical advantages and effects achieved by the above-mentioned dry pre-filming device, which will not be repeated here.

[0107] In this embodiment, the feeding device 38 is arranged above the frame 2 and opposite to the material bin. The feeding device 38 is used to supply powder into the material chamber 17. It has a simple structure and automatic feeding, which saves manpower and realizes automated production.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A dry pre-filming device, characterized in that: include: A frame (2), a material unloading assembly and a dry film stripping assembly (1); The material discharge assembly and the dry film stripping assembly (1) are both arranged on the frame (2), the material discharge assembly comprises a material chamber (17) and a film forming chamber (18) which are interconnected, the material chamber (17) is used to contain powder material and convey the powder material to the film forming chamber (18), and the film forming chamber (18) is used to extrude the powder material into a film; The dry film stripping assembly (1) is located downstream of the film forming chamber (18), and the dry film stripping assembly (1) is used to strip the film from the blanking assembly.

2. The dry pre-filming device according to claim 1, characterized in that: The frame (2) includes a pair of side plates (15), and the unloading assembly includes a pair of steel belt conveying mechanisms (25); A pair of the steel belt conveying mechanisms (25) are arranged opposite to and spaced apart between the pair of the side plates (15); the pair of the steel belt conveying mechanisms (25) and the pair of the side plates (15) respectively enclose the material cavity (17) and the film-forming cavity (18); the steel belt conveying mechanisms (25) are used to convey the powder in the material cavity (17) to the film-forming cavity (18), and to extrude the powder in the film-forming cavity (18) into a film sheet; The dry film stripping assembly (1) is arranged between a pair of side plates (15).

3. The dry pre-filming device according to claim 2, characterized in that: The steel belt conveying mechanism (25) comprises an endless steel belt (26), a steel belt driving roller (27), a steel belt passing roller and a steel belt supporting plate; The annular steel belt (26) is sleeved on the steel belt driving roller (27) and the steel belt passing roller, and the annular steel belt (26) and the pair of side plates (15) sequentially enclose the material cavity (17) and the film forming cavity (18); The steel belt support plate is provided on the inner side of the annular steel belt (26) at least corresponding to the film forming cavity (18), and an air blowing port (35) is provided on the steel belt support plate at least corresponding to the film forming cavity (18), and the air blowing port (35) is used to blow air toward the annular steel belt (26) to form an air lubrication layer between the annular steel belt (26) and the steel belt support plate.

4. The dry pre-filming device according to claim 3, characterized in that: The steel belt conveying mechanism (25) further comprises a heating tube (37), wherein the heating tube (37) is arranged in the steel belt supporting plate and is used to heat the steel belt supporting plate.

5. The dry pre-filming device according to claim 1, characterized in that: The dry film stripping assembly (1) comprises a driving motor (3), an active roller (4), a driven roller (5), a first magnetic wheel (6) and a second magnetic wheel (7); The driving motor (3), the active roller (4), and the driven roller (5) are all arranged on the frame (2); The first magnetic wheel (6) is connected to the output end of the driving motor (3), and the second magnetic wheel (7) is connected to the driving roller (4); The first magnetic wheel (6) is connected to the second magnetic wheel (7) by magnetic transmission.

6. The dry pre-filming device according to claim 5, characterized in that: The dry film stripping assembly (1) further comprises a first translation driving mechanism, wherein the first translation driving mechanism is arranged on the frame (2); The first translation driving mechanism is connected to the driven roller (5) and is used to drive the driven roller (5) to move toward the active roller (4) or away from the active roller (4).

7. The dry pre-filming device according to any one of claims 1 to 6, characterized in that: Also includes at least one powder leveling component (16); The powder flattening component (16) is arranged on the frame (2) and is located at the material cavity (17). The powder flattening component (16) is used to flatten the powder in the material cavity (17).

8. The dry pre-filming device according to claim 7, characterized in that: The powder flattening assembly (16) comprises a second translation drive mechanism and a flattening rod (19); The second translation drive mechanism is arranged on the frame (2) and is located at an end of the material chamber (17) away from the film forming chamber (18); one end of the flattening rod (19) is connected to the second translation drive mechanism, and the other end is located in the material chamber (17); The second translation drive mechanism is used to drive the flattening rod (19) to perform reciprocating translation movement in the material chamber (17).

9. The dry pre-filming device according to claim 8, characterized in that: The powder leveling component (16) further comprises a distance measuring sensor (23); The distance measuring sensor (23) is arranged on the second translation driving mechanism, and the second translation driving mechanism is used to drive the flattening rod (19) and the distance measuring sensor (23) to move synchronously; The distance measuring sensor (23) is used to detect the height of the powder material at the leveling rod (19).

10. A dry pre-filming system, characterized in that: It comprises a feeding device (38) and the dry pre-filming device according to any one of claims 1 to 9, wherein the feeding device (38) is used for supplying powder into the material chamber (17).

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